Auslegungsuntersuchung für den HTR zur Erschliessung von Schwerstöllagerstätten

Gao, Z.

Book/Report

FZJ-2016-05047

Auslegungsuntersuchung für den HTR zur Erschliessung von Schwerstöllagerstätten

Gao, Z. (Corresponding author)FZJ*

1985
Kernforschungsanlage Jülich GmbH, Zentralbiliothek, Verlag Jülich

Jülich : Kernforschungsanlage Jülich GmbH, Zentralbiliothek, Verlag, Berichte der Kernforschungsanlage Jülich 1977, [12], 105 p. (1985)

Please use a persistent id in citations: http://hdl.handle.net/2128/12429

Report No.: Juel-1977

Abstract: In the north-east of China there are rich deposits of very heavy oil, which are to be found in a depth-of 1500 - 1700 m. For opening an injection of 370 - 390° Celsius steam is necessary. The HTR is well suited to produce the steam. A nuclear heat source of 1000 MW makes possible the production of 1.5 million tons oil per year. This is a 30 - 40 per cent higher production of oil compared to the oil-fired steam production. Two concepts of smaller pebble bed reactors are suited as heat sources : the HTR-MEDUL-334 with a thermal power of 334 MW and fuelled in the multiple run-through scheme and the HTR-OTTO-200 with 200 MW and once-through fuelling. Three or five reactors can be combined in the modular way to provide the power of 1000 MW. For both reactors the design, the neutron-physical and thermohydraulic behaviour are followed in the computer simulation. A central of zone the pebble bed reactor is fuelled with elements of strongly, reduced fissile content. Due to the reduced'power density the maximum fuel temperature appearing in extreme accidents is limited and accordingly the release of the fission products is avoided. Detailed investigations for the HTR-OTTO-200 show that a load change from 100 to 70 per cent for a period up to 30 minutes is controlled exclusively by the inherent properties of the reactor without operating the control rods. The interaction between core and steam reformer is investigated under load transients, and the corresponding transients of temperature are derived in space and time. In accident situations a removal of the decay heat by a special afterheat-removal-system is not necessary. Just as the heat losses in normal operation the afterheat is transferred from the containment wall by radiation to a surface cooler located outside. Under failures of the surface cooler sufficient cooling can be obtained by opening of a natural air circulation outside of the containment. From the economic point of view the use of the HTR for steam injection in oil fields is very suitable. Further, it minimizes the pollution of the environment.

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